If so, have you had any problems with your Head Unit?

Mine was OK this morning, but came to attach front panel, all was work except sound. :confused: I could select radio stations, MP3s etc, but no noise. SO I popped off the head unit, and back on again and this time nothing! No power, zip, zaddo, sod all!

Has this happened to anyone else?

Maybe you haven't connected your output wires correctly.

Its been in the car for the last 7 months without any problems

Sounds like a software problem then.

I don't know what I could suggest except to take it to the company you bought the headunit from.